It can fit two kids - my kids were 2.5 and 5.5 years old the last time I put them both in there.
It can be also used as a double stroller, the one I am selling is blue and silver/grey (see pictures below) and has the more "sporty" looking mag wheels.
It collapses nicely to be stored away or to haul to your biking destination.

One of the buttons to hold the screen back is some what broken, but I had no problems using the trailer for it's intended purpose.